Installation Manual – Rail-Based Flush on Metal-Purlin Bracket 2
Table of Contents/Index:
Item Page(s)
Notes ………………………………………………………………………………………………………………3
1. Roof Attachment …………………………………………………………………………………………….4
1.1 Components ………………………………………………………………………………..…………....4
1.2 Advanced Purlin Bracket Installation ………………………...………………………….……….....5
1.3 Racking Installation & GA drawing …………………………………………..………………..…….6
2. Module Clamping ………………………………………………………………………………….……....10
3. Rail Splices Installation ………………………………………………………………………………….….10
4. Expansion joint ………………….………………………………………………………………………..….11
5. Grounding/Bonding ………………………………………………………………………………….…….11
Installation Manual – Rail-Based Flush on Metal-Purlin Bracket 3
NOTES
UL2703 verified compatible modules
Modules chosen for UL2703 grounding/bonding testing were chosen to represent a range of available solar modules. Modules
tested were from the following manufacturers:
• LG NeON– Model LGxxxN2W-A5
• Jinko Solar – Model JKMxxxM-72L-V, JKM-xxx-M-72-H
• Seraphim SRP-xxx-BMA
• Mission MSE-xxx-SQ8T
• Axitec AC-xxx-MH
• Canadian CS6X-xxx-P
Grounding/Bonding
• Only grounding/bonding devices listed in this manual have been approved for use with this racking and qualified per UL2703
installation details provided in this document
• This racking system may be used to ground and/or mount a PV module complying with UL 1703 only when the specific modules
has been evaluated for grounding and/or mounting in compliance with the included instructions.
• Routine maintenance of a module or panel shall not involve breaking or disturbing the bonding path of the system.
• The racking system has a 25 Amp fuse series rating.
• Installer is responsible for and shall provide an appropriate method of direct-to-earth grounding according to the latest edition
of the National Electrical Code, including NEC 250: Grounding and Bonding, and NEC 690: Solar Photovoltaic Systems.
• Installation shall be in accordance with CSA C22.1, Safety Standard for Electrical Installations, Canadian Electrical Code, Part 1.
Periodic Inspection
Periodic re-inspection of installed racking components must take place to identify any loose components, loose fasteners or
corrosion. Loose or corroded components or fasteners must be replaced immediately.
Fire Rating
**UL1703 FIRE CLASSIFICATION**
This system has achieved a Class A fire rating when installed using UL1703 Fire Classification Type 1 and Type 2 modules under the
following conditions:
• Installation must be done in strict accordance to this instruction manual.
• The maximum roof slope may be up to 2”/12” or 9.46°.
Design Load Rating
System Level Allowable Design Load Rating: 35 psf downward, 20 psf upward, 10 psf down-slope.
Each set of site-specific plans must have system loads evaluated and approved by an appropriate structural engineer. This
system is designed to be expandable and is not limited by a maximum number of PV modules. Maximum size of PV modules
evaluated was 79.7" x 40.3" (i.e. typical 72-cell) and modules are mounted in portrait. A typical modular rail length is
approximately 20' (6m) and could hold up to 6 modules.
Label
After the racking system is fully assembled, a single Marking Label should be applied to the rail at the edge of the array. Note: The
sticker label should be placed such that it is visible, but not outward facing.
Sharp Edges and Piercing Module Clamps
Ensure wiring is kept away from any sharp edges that may have resulted from cutting rails etc. Module clamps contain pre-
installed bonding nodes which are designed to pierce the module frame when tightened to proper torque.
Site-Specific Engineering Drawings
This manual is to be used in conjunction with any site-specific engineering drawings that have been developed for your specific
project.
Installation Manual – Rail-based flush on metal-Purlin bracket 4
1. Roof Attachment
1.1 Components
Advanced Purlin Bracket Advanced L Bracket Advanced Rail
Advanced Rail Splice Advanced End Clamp Advanced Mid Clamp
Grounding Lug (SGB-4) EJOT JT3-2-1/4x2” T Bolt & Nut
TOOL LIST:
▪ String Line ▪ Measuring Tape ▪ Sharpie
▪ 13 mm Socket ▪ Impact Driver ▪ Saw For Cutting Rail
Installation Manual – Rail-based flush on metal-Purlin bracket 5
1.2 Advanced Purlin Bracket Installation
• Using measurements from your site-specific Module Layout, locate your starting
location on the roof
BEFORE YOU BEGIN MAKE SURE YOU HAVE THE CURRENT SITE-SPECIFIC
ENGINEERING DRAWINGS AND MODULE LAYOUT DEVELOPED FOR YOUR PROJECT.
▪ Advanced Purlin Brackets come with pre-applied
Butyl Tape for creating a weather seal between the
bracket and the roof deck.
▪ A protective film is applied to the underside of the
tape. THIS MUST BE REMOVED before placing the
bracket onto the roof deck.
▪ 2 pre-drilled holes through the base of the bracket
allow for two EJOT deck screws to be fastened
through the bracket, and into the roof.
▪ Advanced Purlin Bracket must be position directly over the purlin or the PE document
will not apply to the project (Refer to drawing M-001 or R-001).
▪ Often the Racking and modules will not be plotted directly over the purlin or strapping
locations, therefore the installer must choose the next closest location.
▪ It is recommended to use a secondary string line to assure Advanced Brackets are
straight across the roof.
Note:
1. Once the Advanced purlin bracket has been placed
down on the roof deck, the butyl tape will hold the
bracket in place.
2. The bracket is very difficult to remove once the butyl
has made contact with the roof deck. Be sure the
bracket is correctly positioned before applying to the
roof.
3. 25% compression of the deck is required to ensure a
weather seal.
Torque:
3.7 ft-lbs
Installation Manual – Rail-based flush on metal-Purlin bracket 6
1.3 Racking Installation & GA Drawing
• Using string line, mark out
front and rear feet
locations as per your site-
specific module layout
drawing.
• Brackets are positioned
on top of purlin or
strapping, depending on
roof structure type.
• Ensure the front and rear
of each rail start and end
at the same point. Using a
string line will achieve
level and square rails.
• Use the supplied EJOT
deck screws to fasten the
bracket to the roof and
roof purlins.
• Attach the L-foot to the
bracket using the
supplied hex bolt and
and sliding nut.
• Attach the rail to front and rear Advanced L Bracket using T-bolt and nut.
Torque:
13-17 ft-lbs
Torque:
13-17 ft-lbs
Installation Manual – Rail-based flush on metal-Purlin bracket 7
• The system must be
installed such as to meet
the Max. rail cantilever
(1ft), Max. L-foot spacing
(5ft) and Max. rail
spacing requirements
(52”).
• CLAMP NOTE: if module clamps are loosened for maintenance, the location of the
frame piercing pins should be moved to create a new bonding connection.
NOTE: Confirm torque values using only properly calibrated torque wrench.
Maximum rail
spacing is 52”
Maximum rail L-Foot
spacing is 5ft
Maximum rail
cantilever is 1ft
Installation Manual – Rail-based flush on metal-Purlin bracket 10
2. Module Clamping
3. Rail Splice Installation
• Join rails by inserting splice bar into first rail,
then sliding second rail over splice. The
integrated bonding washer bonds the two
pieces of rail. No braided jumper is necessary.
• Splice bars must be inserted into the cavity of
the Advanced rail before you can complete
the installation to the L-Foot
• Make sure splice bar locations do not land
directly over an L-Foot. Splice bars should be
roughly 1/3 distance between L-Foot locations
Mid Clamp
1. Place clamp on rail near first module.
Insert T-bolt inside the TOP SLOT of the rail.
2. Slide next module. Torque bolt to 6-8 ft-lbs
End Clamp
1. Place clamp on rail near end module.
2. For 30 mm thick module only, Mid clamp must be
used to replace End Clamp (See figure below).
Torque bolt to 6-8 ft-lbs
Torque :
6-8 ft-lbs
Torque :
6-8 ft-lbs
For 40mm, 35mm and 30mm thick
modules, use corresponding end clamp
configuration as shown on the figure
beside.
Note: T Bolts are inserted into the TOP SLOT
of the rail.
Installation Manual – Rail-based flush on metal-Purlin bracket 11
4. Expansion Joints
5. Grounding / Bonding
• As per the diagram beside, use SGB-4 to bond
one rail per row of modules using #6 copper
wire. System grounding must be in accordance
with the National Electrical Code, ANSI/NFPA 70.
• Expansion joints are required to minimize stresses to the racking, modules and the roof due to thermal expansion.
• Adding an expansion joint consists of ending a row of modules using end clamps, adding rail splices, then beginning the row again using end clamps on the adjacent rail.
• Expansion joints are typically added every 27 modules, though it is recommended to follow the rail layout drawings provided.
Affix UL2703 label to racking
near final ground lug (i.e. last
ground lug before ground wire
leaves array for combiner or
inverter).
Torque:
2.9 ft-lbs
Torque:
6.25 ft-lbs
NOTE: ISOLATE COPPER FROM ALUMINUM
CONTACT TO PREVENT CORROSION.
NOTE: AFFIX UL2703 LABEL TO THE RACKING IN A
VISIBLE LOCATION NEAR THE GROUND LUG AT
FINAL BONDING LOCATION.
4”
End Clamps
NOTE: Module clamps have piercing pins
achieving an electrical bonding between the
module and the advanced rail.
6